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Copy pathcontroller.py
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194 lines (176 loc) · 7.08 KB
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from ryu.base import app_manager
from ryu.controller import ofp_event
from ryu.controller.handler import CONFIG_DISPATCHER, MAIN_DISPATCHER
from ryu.controller.handler import set_ev_cls
from ryu.topology import event, switches
from ryu.topology.api import get_switch, get_link, get_host, get_all_host, get_all_link, get_all_switch
from ryu.ofproto import ofproto_v1_0
from ryu.lib.packet import packet, ethernet, ether_types, arp
from ryu.lib.packet import dhcp
from ryu.lib.packet import ethernet
from ryu.lib.packet import ipv4
from ryu.lib.packet import packet
from ryu.lib.packet import udp
from dhcp import DHCPServer
from ofctl_utilis import OfCtl, VLANID_NONE
from server import Graph, Switch, Host
from ofctl_utilis import OfCtl
class ControllerApp(app_manager.RyuApp):
arp_map = {}
Graph = Graph()
arpTable = {}
OFP_VERSIONS = [ofproto_v1_0.OFP_VERSION]
def __init__(self, *args, **kwargs):
super(ControllerApp, self).__init__(*args, **kwargs)
@set_ev_cls(event.EventSwitchEnter)
def handle_switch_add(self, ev):
switch = Switch(ev.switch)
switch.isswitch = True
self.Graph.add_switch(switch)
print('add switch')
"""
Event handler indicating a switch has come online.
"""
@set_ev_cls(event.EventSwitchLeave)
def handle_switch_delete(self, ev):
print("handle_switch_delete")
for node in self.Graph.nodes:
if node.datapath == ev.switch.dp:
self.Graph.delete_switch(sw=node)
break
"""
Event handler indicating a switch has been removed
"""
@set_ev_cls(event.EventHostAdd)
def handle_host_add(self, ev):
print("host_add")
host = Host(ev.host)
host.isswitch = False
# ev.host.port.dpid
for nde in self.Graph.nodes:
if nde.isswitch is True:
if nde.dpid == ev.host.port.dpid:
self.Graph.add_host(switch=nde, host=host, port=ev.host.port)
break
# print(self.Graph.nodes)
# print("?????????????????????????????????")
# print(self.Graph.graph)
# print("-----------------------------------")
self.Graph.update_flow_table()
"""
Event handler indiciating a host has joined the network
This handler is automatically triggered when a host sends an ARP response.
"""
# TODO: Update network topology and flow rules
# @set_ev_cls(event.EventHostAdd)
# def handle_host_add(self, ev):
# print('host_add')
# """
# Event handler indiciating a host has joined the network
# This handler is automatically triggered when a host sends an ARP response.
# """
# # TODO: Update network topology and flow rules
@set_ev_cls(event.EventLinkAdd)
def handle_link_add(self, ev):
print('handle_link_add')
global nodeA, nodeB
for nde in self.Graph.nodes:
if isinstance(nde,Switch) and nde.dpid == ev.link.src.dpid:
nodeA = nde
break
for nde in self.Graph.nodes:
if isinstance(nde,Switch) and nde.dpid == ev.link.dst.dpid:
nodeB = nde
break
self.Graph.add_link(nodeA, nodeB, ev.link.src, ev.link.dst)
self.Graph.update_flow_table()
# print(self.Graph.graph)
"""
Event handler indicating a link between two switches has been added
"""
# TODO: Update network topology and flow rules
@set_ev_cls(event.EventLinkDelete)
def handle_link_delete(self, ev):
print("link delete")
global nodeA, nodeB
for nde in self.Graph.nodes:
if nde.dpid == ev.link.src.dpid:
nodeA = nde
break
for nde in self.Graph.nodes:
if nde.dpid == ev.link.dst.dpid:
nodeB = nde
break
self.Graph.delete_link(nodeA, nodeB, ev.link.src, ev.link.dst)
self.Graph.update_flow_table()
"""
Event handler indicating when a link between two switches has been deleted
"""
# TODO: Update network topology and flow rules
@set_ev_cls(event.EventPortModify)
def handle_port_modify(self, ev):
print('modify port')
# print(ev.msg)
global switch
for nde in self.Graph.nodes:
if nde.dpid == ev.port.dpid:
switch = nde
break
self.Graph.modify_port(port=ev.port, state=ev.port._state)
self.Graph.update_flow_table()
"""
Event handler for when any switch port changes state.
This includes links for hosts as well as links between switches.
"""
# TODO: Update network topology and flow rules
@set_ev_cls(ofp_event.EventOFPPacketIn, MAIN_DISPATCHER)
def packet_in_handler(self, ev):
try:
msg = ev.msg
datapath = msg.datapath
pkt = packet.Packet(data=msg.data)
pkt_dhcp = pkt.get_protocols(dhcp.dhcp)
inPort = msg.in_port
if not pkt_dhcp:
arp_pkt = pkt.get_protocols(arp.arp)
oftcl = OfCtl(datapath, logger=None)
if arp_pkt:
arp_pkt = arp_pkt[0]
# print(arp_pkt)
tag_ip = arp_pkt.dst_ip #这里会报错？为什么
print(tag_ip)
global mac
flag = False
for nde in self.Graph.nodes:
if nde.isswitch is False and nde.ip == tag_ip:
mac = nde.mac
flag = True
break
if flag:
oftcl.send_arp(vlan_id=VLANID_NONE, arp_opcode=arp.ARP_REPLY, dst_mac=arp_pkt.src_mac,
sender_mac=mac, sender_ip=arp_pkt.dst_ip,
target_mac=arp_pkt.src_mac, target_ip=arp_pkt.src_ip,
src_port=datapath.ofproto.OFPP_CONTROLLER,
output_port=inPort
)
else:
self.arp_map[arp_pkt.src_ip] = arp_pkt.src_mac
# ip = arp_pkt.src_ip.spilt('.') # 192.168.2.2
# num = int(ip[3])
# host_mac = arp_pkt.src_mac
# host_ip = arp_pkt.src_ip
# flag = False
# for node in self.Graph.nodes:
# if host_mac == node.mac:
# flag = True
# break
# if not flag:
# sw = self.Graph.nodes[num]
# host = Host(host_mac, host_ip, sw.dpid)
# self.Graph.add_host(sw, host, None)
else:
DHCPServer.handle_dhcp(datapath, inPort, pkt)
return
except Exception as e:
self.logger.error(e)
# def cal_shortest_path(self,ev):